DynaGen GSC400 Series, Installation And User Manual

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Terminal
Detail
Terminal
Location
Wire Size
(AWG)
Current
max.
Function
CANH 1 18 7mA CANH Connection
Ground 2 18 7mA Ground Terminal
Connection
CANL 3 18 7mA CANL Connection
Ground 4 18 7mA Ground Terminal
Connection
J1939
(CAN)
Important!
120Ohm resistors must be placed on either end of the bus.
4.4.1 CAN Wiring Note (J1939)
The CAN communication bus’s CANL and CANH lines must be terminated with
120Ohm resistors on either end of the bus.
If you are not connecting to an existing bus
you must do this. If you are connecting to an existing bus check that it has the proper
terminating resistors.
To check for proper resistance disconnect the CAN bus harness from the GSC400 and
measure across the CANH and CANL pins on the harness connector. It should be 60
Ohms (two 120 Ohms in parallel). If you measure 120Ohms then only one resistor has
been installed.
If using the optional J1939 harness DWG1373R3-5 from Dynagen there is a 120Ohm
resistor built in. It can be cut out if the GSC400 is not the last device on the bus. If you
are using DWG1375R2-5 this version of the J1939 harness does not have a terminating
resistor.
4.4.2 Current Transformer (CT) Wiring Note
The current transformers (CTs) negative leads must be terminated individually into the
GSC400 AC Current connector.
Do not tie the negative leads together to a common
neutral or ground. The negative lead of the CT is usually black.